IP Telephony

Beschreibung

IP (internet protocol) Telephony, enabled by softswitches, isgoing to usher in a new era in telecommunications. By putting voiceand data over one IP network, operators can enjoy lower costs andcreate new, revenue-generating "multimedia" services. This valuable reference offers a comprehensive overview of thetechnology behind IP telephony and offers essential information tonetwork engineers, designers and managers who need to understandthe protocols and explore the issues involved in migrating theexisting telephony infrastructure to an IP-based real timecommunication service. Drawing on extensive research and practical developmentexperience in VoIP from its earliest stages, the authors giveaccess to all the relevant standards and cutting-edge techniques ina single resource. IP Telephony: Deploying Voice-over-IP Protocols: * Assumes a working knowledge of IP and networking and addressesthe technical aspects of real-time communication over IP. * Presents a high level overview of packet media transporttechnologies, covering all the major VoIP protocols - SIP,H323 and MGCP * Details specific strategies to design services for publicnetworks where endpoints cannot be trusted and can be behindfirewalls. * Explores the problems that may arise from incomplete protocolimplementations, or architectures optimized for private networkswhich fail in a public environment. This amply illustrated, state-of-the art reference tool will bean invaluable resource for all those involved in the practicaldeployment of VoIP technology.

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Olivier Hersent

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Communication Technology - Networks Computer Science Electrical & Electronics Engineering Elektrotechnik u. Elektronik Informatik Kommunikationsnetze Networking Netzwerke

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